Best Answer: I have been a police officer for almost 40 years. Just like civilian communication, police communication has evolved over the years, Before two-way radios, officers could call into headquarters on call boxes, which were located at various locations on their beats. was just wondering, how exactly did police officers communicate with one another before cellphones were widely used (early 70s era specifically)?
3 Stars. Nitroglycerin is used to treat congestive heart failure, to help prevent frequent chest pain caused by a heart condition known as angina, and to relieve pain caused by chronic anal fissures. The drug is available under the brand names Nitromist, Nitrobid, Nitro-Dur, Nitrostat, Imdur, Isordil and Rectiv.
Nitroglycerin (NTG) Nitroglycerin is used medically as a vasodilator to treat heart conditions, such as angina and heart failure. It is one of the oldest and most useful drugs for treating heart disease by shortening or even preventing attacks of angina. Nitroglycerin comes in forms of tablets, sprays or patches.